macOS Remote System Discovery via ARP and Ping

SigmaHQ Detections@sigmaHQ

•updated Aug 12, 2024•1•0•36

This rule detects attempts to enumerate remote systems on a macOS host using the 'arp' and 'ping' utilities. Specifically, it looks for 'arp -a' commands, which list all current ARP entries, and 'ping' commands targeting common private IP address ranges (10.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12) as well as localhost (127.0.0.0/8) and APIPA (169.254.0.0/16) ranges. This activity is indicative of an adversary performing network discovery to identify other systems for potential lateral movement.